public class Example4_7 {
	public static void main(String args[]) {
		Battery nanfu =new Battery(100);
		System.out.println("南孚电池的储电量是："+nanfu.electricityAmount);
		Radio radio = new Radio();
		System.out.println("收音机开始使用南孚电池");
		radio.openRadio(nanfu);
		System.out.println("目前南孚的储电量是："+nanfu.electricityAmount);
	}
}
